Item Name: Laboratory BNC Connector For Aquarium PH Electrode Probe PH Controller. Zero-point: 7 +- 0.5PH Operating Temperature: 0-60C Terminal Blocks: BNC plug Internal Resistance: 250M Cable length: Approx. 70cmTheoretical Percentage Slope: 98.5% Measurement range: 0.00~14.00 PH Response Time: 1min Alkali Error: 0.2PH Feature:BNC connector, suitable for most pH meter and controller with BNC connector. Suitable for wide range of application: Aquariums, Hydroponics, Laboratory etc. Packing List: 1 x pH Electrode Probe *Please make